Abraham Wasn't Born Jewish — Here's When He Actually Became One

Welcome to Live Classes: The Origin of the Jewish People (Part II)

Was Abraham actually Jewish — or did that title only apply retroactively, centuries before there was a Torah to receive?

In this shiur, Rabbi Heschel Greenberg picks up the halachic debate over Abraham’s legal status: was he simply a Ben Noach like everyone else in his generation, bound only by the seven Noahide laws, or did he hold a separate status of his own? Drawing on the 20th-century Rogatchover Gaon (Rabbi Joseph Rosen), Rabbi Greenberg explains that Abraham could not technically have been “a Jew” in his own lifetime — the category didn’t exist until the Jewish people were formed as a nation at Mount Sinai. Only retroactively, once that revolution took place, did Abraham, Isaac, and Jacob become its founders. From there, the class walks through the different moments in Abraham’s life that various authorities point to as “when it really started” — his willingness to die in the fiery furnace of Ur Kasdim, his response to God’s call to leave his homeland, and finally his circumcision at age 99, the first commandment given to him beyond the Noahide laws.

Along the way, Rabbi Greenberg unpacks a striking Talmudic principle: someone commanded to do a mitzvah and who does it stands higher than someone who does the same good deed purely voluntarily — because a commandment is what actually creates the “bridge” connecting a finite person to an infinite God. He also surveys the Mishnah’s Ten Tests of Abraham, from the furnace and the famine to the abduction of Sarah, the war to rescue Lot, the Covenant Between the Pieces, and the very human dilemma of whether to publicize his own circumcision.

🔎 In this video we explore:

Why the Rogatchover Gaon says Abraham couldn’t have been “Jewish” in his own day — and how he became one retroactively The archaeological discovery at Ebla that some point to as corroborating the Genesis narrative Why the Talmud says being commanded to do good is greater than volunteering to do it The real reason Abraham deliberated over whether to make his circumcision public Why Pharaoh’s abduction of Sarah, and later Avimelech’s, counted as two separate tests What it meant for Abraham to hear, in the Covenant Between the Pieces, that his own children would be enslaved Why Noah — despite saving humanity — never earned the title “the first Jew”

⏱️ TIMESTAMPS

📚 Sources discussed: Rogatchover Gaon (Rabbi Joseph Rosen), Rambam (the “Prime Mover” argument), Talmud (gadol ha’metzuveh v’oseh), Rashi, Zohar, Midrash, Mishnah (Ten Tests of Abraham)

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